Means for cooling sewing machine needles



A 17 1945 A. ALBERO MEANS FOR COOLING SEWING MACHINE NEEDLES lFiledSept. l, 1942 Patented pr. 17,1945

".UNITED STATES PTENTOFFCE i MEANS Foa COOLING SEWING MACHINE NEEDLES lv :.VAndrew Albero,lDelawareGardena,N. j I 'Appleman september 1,1942,seriainaas'sv 4 claims. A(.01. i12-256) l My invention relates to anewand useful means for. coolingsewing machine needles, andhas for one ofits objects toeffect the cooling operations underneath of or beyond thereverse side of the goods or work, for example, under, flush with orcontiguousl the throat plate.

Another object'of this invention is to provide means to retain a coolingmedium in the path of travel of a sewing machine needle and so lo-.cated as to cool said needle after it has penetrated the work.

Another object of the invention is to attach the holding means for thecooling medium to any suitable part of the sewing machine so that saidcooling medium will be in the path of travel of the needle beyond thereverse side of the work.

Another object of the. invention is to attach the holding means for thecooling medium to the feed bar.

It is a well known fact that when a sewing machine needle is operated athigh speed through thick, heavy or close material, considerable fric`tional heat is generated which scorches the thread so it becomes weakand. often breaks, and takes the temper out of the needle so that thelatter soon becomes useless and also often breaks. When a needle breaksthere Iis always the likelihood of ,it causing injury to the operatorand frequent breaking of needles causes considerable loss of time sincethe operator must change and rethread the needles each time. Thereforean object of the present invention is to reduce the heat of the needleto a degree sufficient to eliminate the above mentioned disadvantages.

With the above and other objects in view this inventionconsists of thedetails of construction and combination of elements hereinafter setforth and then designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same I will describe anumber of constructions in detail referring by numerals to theaccompanying drawing, in which:

Fig. 1 is a view looking at the end of the bed plate of a sewing machinewith portions broken away and shown in section to illustrate therelation of the needle cooling means to certain parts of the sewingmachine.

Fig. 2 is a fragmentary plan view of the bed plate with the bobbin orshuttle access plate removed.

Fig. 3 is a fragmentary perspective view of the feed bar with the needlecooling means attached thereto.

Fig. 4 is a perspective view of `the aforesaid needle cooling meansdetached. s l

In 'carrying out' my invention/'as herein embodied, I0 represents thebedr plate of a sewing 'machine having an access opening II which ispartiallyclosed at the inner end by a throat plate I2 held in pl-ace byscrews I3 that permit its removal when necessary. The outer endv of saidopening lII is temporarily closed by a bobbin or shuttle access plate(not shown).

The feed bar I4 is mounted under the bed plate I0 and carries the feeddog structure I5 which projects through suitable slots in the throatplate I2 for intermittently feeding the work as the feed bar isreciprocated longitudinally and oscillated vertically, as is usual. Thefeed dog structure is detachably mounted on the feed bar by screws I6 orequivalent fastening devices. Cooperating with the feed ldog structureis theusual presser foot 1 and the needle is designated by the numeral 8while the rotary sewing hook is represented by the reference 9.

The needle cooling means shown in Figs. 1 to 4 inculsive, and designatedas a whole by the numeral I1, comprises a bracket or bracket plate I8,Figs. 3 and 4, that may be secured to ani7 suitable part of the machine.As an example, it

is shown attached to feed bar I4, and in particular it is illustrated asclamped between said feed bar and the feed dog structure so as to belocated below the top of said feed dog structure or on the reverse sideof or contiguous the throat plate I2 underneath of the position of thework. The under side of the throat plate I2 may have a recess I9, Fig.l, or said throat plate can be thinner than usual to accommodate thecooling means.

'I he bracket' plate I8 carries a head 2D, preferably formed as anintegral part thereof, and one portion of said head is shown as bentback upon another portion to form a holder for a piece of wick 2| orother suitable retainer for the cooling medium, such as oil, whichretainer and consel quently/ the cooling medium, is in the path oftravel of the needle as it reciprocates during the sewing operations. Inother words, the cooling means or, more specifically, the cooling mediumis in line with the needle hole through the throat plate. f

The ybracket plate is apertured to receive one or both screws of thefeed dog structure. and such aperture can be a slot 22 so that saidbracket plate can be slipped into place without completely removing thescrews I6. In order to properly position the cooling means and alsoprevent wigkgling. one or two flanges 23 can be formed on adtween thetime the needle contacts the cooling medium and said needle againpenetrates the work. This allows the needle to further cool oi naturallyby radiation in the'surrounding air.`

Of course I do not Wish to be limited to the exact details ofconstruction herein shown and de-A scribed as these may be varied Withinthe scope of. the appended claims without departing from the spirit ofmy invention.

Having described my invention what I claim as new and useful is:

l. .The combination with a sewing machine including a feed bar and feeddog structure carried thereby, of a holding means attached to said feedbar and positioned below the top surface of said feed dog structure, anda cooling medium carried by said holding means in the path of travel ofa needle, said needle contacting the cooling medium after penetratingWork.

2. A sewing machine needle cooling appliance comprising a bracket plateto be secured to the feed bar of a sewing machine, a head on said plate,a retainer fory a cooling medium carried by said head, and flanges atright angles to one another on two adjacent edges of the bracket plate.

3. A sewing machine needle cooling appliance comprising an aperturedbracket plate adapted to be clamped between the feed dog and the feedbar,v a head on said plate, and a retainer for a cooling medium carriedby said head and projecting across an aperture.

4. The structure in claim 3 wherein the head is formed of a section ofthe plate bent back upon a contiguous section thereof.

ANDREW ALBERO.

